摘要
在面向对象模型中加入对动态属性的支持,提出和建立了一种面向对象的支持全时域数据存储和查询的移动对象数据模型。探讨了GPS定位信息中精度、方位等信息对移动对象位置更新的影响,并给出了一种新的基于定位精度、速度和方位的动态阈值位置更新策略,解决了移动对象的全时域存储和查询方法。最后对面向对象的全时域移动对象数据模型进行了验证,实验表明该动态阈值位置更新策略在不影响移动对象运动轨迹精度的情况下,可以有效减少位置更新,节省数据传输流量,减少数据存储量。
An object-oriented moving object data model supporting full-time data storage and query was put forward,which added dynamic attributes to the object-oriented model.The influence of Global Positioning System（GPS） positioning accuracy and direction on the moving object location updating was discussed,and a new location updating strategy of dynamic threshold based on the positioning accuracy,speed and direction was constructed.Therefore,the storage and query of full time domain of the mobile object were solved.Finally,an experiment about this new moving object data model was carried out.And the result show that the dynamic threshold location updating strategy of the model can effectively reduce the frequency of location update,save the data transmission flow,and reduce the amount of data storage without affecting the moving objects trajectory precision.
出处
《计算机应用》
CSCD
北大核心
2013年第4期1015-1017,1022,共4页
journal of Computer Applications
基金
福建省自然科学基金资助项目(2012J01168)
关键词
移动对象
时空数据模型
移动对象数据库
位置更新策略
面向对象
moving object
spatio-temporal data model
moving object database
location update strategy
object-oriented
